Traditional 10 wood block deck scrub with polypropylene bristles for use in corners, along baseboards, and other areas where floor machines cant reach. Non-absorbent crimped synthetic bristles wash easily and prevent gathering of mold and mildew. Bristles are chemical resistant and hold solutions well.Good for general scrubbingNatural hardwood blockCrimped polypropylene bristles hold solutions wellNot affected by solvents or acids